class noPyramid{ public static void main(String[] args) { // rev for (int i = 4; i>=1; i--) { for (int j = 1; j <=i; j++) { System.out.print(j+" "); } System.out.println(" "); } // plain for (int i = 1; i<=4; i++) { for (int j = 1; j <=i; j++) { System.out.print(j+" "); } System.out.println(" "); } } }